Septic FAQ for Flathead Valley Homeowners

The EPA's general guideline is to have a household septic tank inspected about every 3 years and pumped every 3 to 5 years. Larger households, smaller tanks and garbage disposals mean more frequent pumping. See septic pumping.

New systems, replacements, and many repairs and alterations require a permit through Flathead County Environmental Health, and installation must be done by a county-licensed installer (or a homeowner who has passed the county's self-installer test). Routine pumping doesn't need a permit. Always confirm current requirements with the county. See drainfields & new systems.

If your utility bill has no sewer charge, your home is very likely on septic. Flathead County Environmental Health may also have a permit record for your property.

Look for a permit drawing from the county, follow the main sewer line out from the house, or look for risers, lids, or a slight depression in the yard. A septic professional can locate it if you can't.

Slow drains, gurgling, sewage odors, soggy or extra-green ground over the drainfield, sewage surfacing in the yard, and backups into the house. See septic repair.

Yes. Shallow lines, compacted snow, low use and leaky fixtures make freezing more likely during Flathead cold snaps. Keep vehicles off the system, leave undisturbed snow or mulch over it for insulation, and call a professional if it freezes — don't use antifreeze or salt.

Stop using water, keep people and pets away, check any pump breaker, and call for help. See emergency septic service.

Yes. Replacing a drainfield can cost many thousands of dollars, so an inspection before closing is inexpensive protection — especially for older homes and lake properties. See septic inspections.

A standard pump-out usually runs a few hundred dollars; drainfield replacement can run into the tens of thousands. See the Flathead septic cost guide.

Additives aren't a substitute for regular pumping, and some chemical products can harm the system. Regular pumping and keeping grease, wipes and chemicals out of the drains are what keep a system healthy.

Grease and cooking oil, "flushable" wipes, paper towels, feminine products, cat litter, paint, solvents, medications and large amounts of harsh cleaners.

No. We're a free referral service that connects homeowners with independent local septic professionals, who provide their own quotes and do the work. There's no charge to you for using our service.